at 11.7 mpg with 5 gallons left i don't think i'll be going 100 miles ..lol
i was just curious as to how far down the tank will it still pick up fuel. maybe the float got a little bent or something and is showing less fuel than there actually is . either that or it's not really an 18 gallon tank. i know in my old Z24 the light usually came on with less than 2 gallons left so i had about 20 miles before she started sputtering.
i've never had a car that wouldn't get at least 200 miles out of a full tank ...especially one that holds 18 gallons .